diff --git a/base/src/org/compiere/model/MEXPFormat.java b/base/src/org/compiere/model/MEXPFormat.java
index 94bacb2b09..3923d90ad0 100644
--- a/base/src/org/compiere/model/MEXPFormat.java
+++ b/base/src/org/compiere/model/MEXPFormat.java
@@ -50,11 +50,10 @@ import org.compiere.util.CLogger;
  *
  */
 public class MEXPFormat extends X_EXP_Format {
-
 	/**
 	 * 
 	 */
-	private static final long serialVersionUID = 1455411275338766608L;
+	private static final long serialVersionUID = -5011042965945626099L;
 
 	/**	Static Logger	*/
 	private static CLogger	s_log	= CLogger.getCLogger (MEXPFormat.class);
diff --git a/base/src/org/compiere/model/PO.java b/base/src/org/compiere/model/PO.java
index 54efe3006e..bc22517a0e 100644
--- a/base/src/org/compiere/model/PO.java
+++ b/base/src/org/compiere/model/PO.java
@@ -91,9 +91,9 @@ public abstract class PO
 	implements Serializable, Comparator, Evaluatee
 {
 	/**
-	 *
+	 * 
 	 */
-	private static final long serialVersionUID = 8413360272600437423L;
+	private static final long serialVersionUID = 4112064325136026951L;
 
 	private static final String USE_TIMEOUT_FOR_UPDATE = "org.adempiere.po.useTimeoutForUpdate";